Saiyaku wa Boku wo Suki Sugiru

Two families are bound by a curse that requires a member from each to share the same fate for one year every century. During this time, they endure 12 misfortunes in which injuries suffered by one are mirrored by the other. Kagura Izumi lived a normal life after his parents' death in an accident until his 17th birthday, when he met the transfer student Ichijyou Chihaya. Their meeting marks the beginning of a shared fate, as they must now face 12 misfortunes on the 13th of each month for the next year. No pair in the history of this curse has survived.